The License issues is just for your dilemma. This site has changed systems over the years so it is very possible that they have misplaced you email address.
As far as your own solution. I would think you have a way to back up your site, This is usually ftp.
Your host should provide you with how to do this.
This is just a way to access your site and download or upload the files contained on your site.
Depending on where your members directory is. It could be above the root. Meaning that it is not in a area that the general public has access to.
You would need to find the members folder and find the admin file.
Even if you open a support ticket ubb will need the same info to access your files to determine the login.
